Saw for cutting metals



Feb. 20,4 192s.

P.. V. VERNON.

SAW FOR CUTTING METALS.

ORIGINAL FILED OCT- 30.11919- Pea-mies Feb. ze, ie23.'

PERCY viiNiiBLns vniiivoivyor ieiiiensLnY, ENGLANDL i saw roncu'trrriveMETALS.,

` origiiiai application inea october zo, wie, serial No. 334,505.Divided faim this app'natiqn fiied March 3, 192i.4 seriai No. 449,507.

To allwhom t ffii-ay concern.' Be it known that l, PERGYVENABLES' VER-NQN, :i subject of the King of England, r'e-.

siding atleresley, in thelcounty of .Ti/Varwick, England, have inventedcertain new and useful Improvements in Saws for Cutting Meta-ls, ofwhich the following .is a specification.

This invention relates to sawsfor cutting metal, more particularly tothose of the circu-k lar type, such as described in my application Ser.No. 334,505, filed Oct. 30, 1919, whereof this is a division and it hasfor its object to provide simple ineens whereby they metal chips, whichadhere tothe cutting teeth and i'ednce their cutting efliciency, may beremoved.

According to this invention, this is effected by a rotating member inthe form of 'a disc v with radially projecting teeth around itsperiphery adaptedtoenter, the spaces between the saw teeth and to moveacross or along the cutting faces of the teeth so as thereby to traversesuch faces and to clear them of chips, the driving of the disc beingeffected by the saw through. engagement of its teeth with those of thedisc. f

Means may be provided for applying to j the disc a resiliently-actingbraking effect to increase the pressure of contactof the en? gagingteeth, and the disc may be so mounted as to be 'displaceable againstayielding thrust to disengage the saw teeth if the spaces between thelatter become choked.'-

The manner of carrying out the invention is illustrated in theaccompanying drawings, in which Figure l is a4 sectional elevation, and

i Figure 2 is a plan having a portion broken away for clearness.

Fig. 3 is a view drawnon an enlarged scale showing a portion ofthechip-remover larged view of Fig. 3l lnthat iigure, the

sects the saw-axis B at any suitable angle,`

(preferably ata right angle).V audits" teeth 2 mesh with the saw-'teethC, so that thev saw thereby causes it yto rotate'. The .axle 8 isendwise adjustablein abo-ss a at theend of a plungerk 5 parallelwiththefsaw'axisfB and pressed by a spring '6. towards the saw- A. Cheeknids Tere adapted to" limit 'the niovement of the plunger 5 towards thesaw, and

a feather 8 in the plunger guide 9 engages a` i y;

spring 6 is to prevent damage if any jam-` ming shouldaccidentallyoccur. i v

Aguard ll is mounted on thelaxle, 3Qt0 cover the .disc l and is pressedresiliently nponit to act as a brake by' means of a spring l2 loadedbynieans of adjn'sti'ng nuts l?) on the threaded .axle A 'downwardlydirected lip 14C-upon ,thegiiard y1l deflects the chips in a safedirection as theyfare dis'` charged'from the saw teeth. The braking soyaction `upon the disc is of importance in en suring a dragging action ofthe'dis'clteeth upon thefaces of the saw chips. The spring l2 alsoallows thediscfto lift f if any chips should j the tooth spaces ofthesaw.

teeth'to clear the 'Rotation of., the guardllfwith `the disc l i ispreventedybythe vprovision on ythe former of jaws l5, which engage a`projection "1 6 on the plunger guide 9, the depth of. the

m under'thejdisc in Y jaws allowing Vfor any eiidwise movementl of Theundercut portionsof thechip remover and the relative positions of itsteeth and the teeth of the saw are clearlyv shown in the enpoint ofone'toothAQ; of thechip. `remover is shown as commencing to engagewith asaw.

tootlrA, while ,thepoint of another ytooth J 2 is just leaving thesawtooth A?. ,Between the teeth A, A2 ofthe saw are -sli own 'inter`mediate positions of the saw yteeth and cor; responding intermediate.positions of the' A teeth2 ofthe chip remover, whereby, the

scraping action of the points of the teeth' as j `metal-cutting saws,the combination is essential. 1Without this undercutting tno lia-nhs ot'the teeth would bear on the edges of the saw teeth so that the actingedges which eii'ect the scraping V would be lifted off the teeth, andthus would fail to remove the chips. Furthermore, it will be evidentthat the under-cutting gives a more ravorziible scraping angle (angleoc) the tooth.

Yl`he invention is obviously applicable to band and other types oi2 sawand is not restricted in its application to circular saws only,

lWhat l claim as my invention and desire to lsecure by Letters Patent ofthe United States is z-a l. ln a device for removing chips trommetal-cutting saws, the combination with the saw, ot a rotatable dischaving along its periphery radially disposed teeth adapted' to enter andtraverse the spaces between vthe saw teeth, and to be driven by them.

2. in device for removing` chips from metal-cutting saws, lthecombination with the saw, ot arotatable disc having along its peripheryradially disposed teeth with their points circumferentially wider thantheir shanks, the said teeth being adapted to enter the spaces betweenthe teeth of the said saw so as to traverse them and be driven thereby.

In a device for removing chips from with the saw, of a rotatable dischaving along its periphery radially disposed teeth adapted to enter thespaces between lthe saw teeth, an axle carrying said disc, and la memberyieldingly thrust towards the plane of said saw and carrying said discaxle in such manner that said disc teeth traverse the faces of said sawteeth and are driven by them.

4. yln a device tor removing chips trom metal-cutting saws, thecombination with the saw, ot a disc having along its periphery radiallydisposed teeth adapted to enter the spaces between the teeth o' saidsawto traverse the faces ot' said teeth and to be driven by them, and abrake resiliently applied to said disc to resist its rotationalmovement.

5. ln a device for removing chips 'from metal-cutting saws, thecombination with the saw, oi? a disc having along its periphery radiallydisposed teeth adapted to enter the spaces between the teeth ot said sawto tra-verse the taces or said teeth and to be driven by them, a guardadapted to bear against one. side ot said disc and Aprovided with. a lipadjacent the engaging teeth of said disc and said saw to guide the pathof the .tor the point of refieres chips removed, a spring adjustablyloaded to thrust said guard against said disc thereby to resist itsrotational movement, and means `tor preventing said guard rotating withsaid disc.

6. ln a device for removing chips from metal-cutting saws, thecombination with a circular saw, oi a disc mounted to rotate about anaxis transverse to that ot' the saw, radially disposed teeth along theperiphery ot said disc, undercut trom their tips to,- wards their rootson their acting sides, which teeth are adapted to enter the spacesbetween the saw teeth to traverse the laces of said teeth and to bedriven by them, an axle endwise adjustable to'or from the saw centre,carrying said disc, a plunger arrying sa'd axle and movable endwise toor from the saw plane but resiliently thrust towards the saw, a guardcarried by said disc aille, a spring carried by said to bear upon saidguard, an adjustable abutment for said spring carried by said ariethereby to cause resilient pressure ot said guard upon said disc, meanst'or preventing rotation of said guard with said disc, and a lip termedon said guard adjacent the engaged teeth ot said disc and said saw.

7. The combination oit a circular saw having teeth and having gulletsbetween the teeth; and a rotating chip remover .located at one side oliithe saw, having arms extendinto the gullets so that as the remover isrotated by the saw it will push the chips from the gullets.

S. rllhe combination in a chip remover for saws, of a circular sawhaving teeth; gullets between the teeth and having a clip remover in thetorni oi a rotating device han arms; a stud on which the device ismounted so as to turn freely; and a. bracket carrying the stud, saidstud being adjustable on the bracket towards and Afrom the saw.

Q. A chip remover ttor saws having` a series ot arms arranged to belocated at one side ot the saw in such position that the arms will enterthe gallets ot the saw between the teeth and push the chips laterallytherefrom, the teeth of thesaw actingupon the arms to rotate theremover.

ln testimony whereof l have signed my name to this specification in thepresence oi two subsci'ibing` witnesses.

ERY VENABLES Vlllthltlll. lWitnesses C, CriAnirso/N,

li. lf. Allannrsori.

ing

